Howdy folks. I'm shopping around for thermostats and have a question.

Aside from the built in night drop (in some models), what do proportional thermostats have over straight thermostats? Does the constant temperature fluctuation of the straight thermostats bother the snakes or have any ill effects on them?

BTW I'll be using a UTH/CHE combination.

What do y'all think about the Johnson A419?

Thanks everyone.

Ari